Roon Image + WiFi

I've set-up a Roon Image on a Pi3B + Dig+ and want to use Wi-Fi so as to avoid having to install cabling. Are there specific USB Wi-Fi dongles that are supported in the distribution? And, if not, then are there instructions (for someone with little to no Linux knowledge) as to how to install the appropriate drivers? And, to prove how much of a newbie I am, how would I enter the Wi-Fi security details given that the image is headless?